diff --git a/tools/elf2uf2/main.cpp b/tools/elf2uf2/main.cpp
index 6b3c525d5..5245fec36 100644
--- a/tools/elf2uf2/main.cpp
+++ b/tools/elf2uf2/main.cpp
@@ -129,7 +129,7 @@ int check_address_range(const address_ranges& valid_ranges, uint32_t addr, uint3
     for(const auto& range : valid_ranges) {
         if (range.from <= addr && range.to >= addr + size) {
             if (range.type == address_range::type::NO_CONTENTS && !uninitialized) {
-                return fail(ERROR_INCOMPATIBLE, "ELF contains memory contents for uninitialized memory at %p", addr);
+                return fail(ERROR_INCOMPATIBLE, "ELF contains memory contents for uninitialized memory at %08x", addr);
             }
             ar = range;
             if (verbose) {